com.vividsolutions.jts.operation.valid

Class IsValidOp


  • public class IsValidOp
extends Object
    Implements the algorithms required to compute the isValid() method for Geometrys. See the documentation for the various geometry types for a specification of validity.

    • Constructor Detail

      • IsValidOp

        public IsValidOp(Geometry parentGeometry)

    • Method Detail

      • isValid

        public static boolean isValid(Geometry geom)
        Tests whether a Geometry is valid.
        Parameters:
        geom - the Geometry to test
        Returns:
        true if the geometry is valid

      • isValid

        public static boolean isValid(Coordinate coord)
        Checks whether a coordinate is valid for processing. Coordinates are valid iff their x and y ordinates are in the range of the floating point representation.
        Parameters:
        coord - the coordinate to validate
        Returns:
        true if the coordinate is valid

      • findPtNotNode

        public static Coordinate findPtNotNode(Coordinate[] testCoords,
                                       LinearRing searchRing,
                                       GeometryGraph graph)
        Find a point from the list of testCoords that is NOT a node in the edge for the list of searchCoords
        Returns:
        the point found, or null if none found

      • setSelfTouchingRingFormingHoleValid

        public void setSelfTouchingRingFormingHoleValid(boolean isValid)
        Sets whether polygons using Self-Touching Rings to form holes are reported as valid. If this flag is set, the following Self-Touching conditions are treated as being valid:
        • the shell ring self-touches to create a hole touching the shell
        • a hole ring self-touches to create two holes touching at a point

        The default (following the OGC SFS standard) is that this condition is not valid (false).

        This does not affect whether Self-Touching Rings disconnecting the polygon interior are considered valid (these are considered to be invalid under the SFS, and many other spatial models as well). This includes "bow-tie" shells, which self-touch at a single point causing the interior to be disconnected, and "C-shaped" holes which self-touch at a single point causing an island to be formed.

        Parameters:
        isValid - states whether geometry with this condition is valid

      • isValid

        public boolean isValid()
        Computes the validity of the geometry, and returns true if it is valid.
        Returns:
        true if the geometry is valid

      • getValidationError

        public TopologyValidationError getValidationError()
        Computes the validity of the geometry, and if not valid returns the validation error for the geometry, or null if the geometry is valid.
        Returns:
        the validation error, if the geometry is invalid or null if the geometry is valid